Upgrading the battery and have a few questions:

1). The 2020 (and probably all 5Gen) is a liquid acid battery. Some people when putting in an AGM battery are reporting a premature death because of alternator/AGM battery incompatibility. Do you think this is a 4Gen and lower problem? Any reports of this happening in 5Gen 4Runners?

2). Is this an alternator issue? Does the 5Gen alternator only work with certain batteries? Is there a best type of battery for the alternator that's in the 4Runner?

2). If I decide to stick with liquid acid, should my secondary battery also be a liquid acid or is it ok for the second battery for accessories to be an AGM?

3). What is the best battery type for accessories?